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Comparison of Chemical Compositions and Antioxidant Activities of Condensed Tannins From Different Parts of Calliandra haematocephala by Shudong Wei; Hui Chen; Yiming Lin is a Engineering article available to read on EtoBox.
What is Comparison of Chemical Compositions and Antioxidant Activities of Condensed Tannins From Different Parts of Calliandra haematocephala about?
In this study, the condensed tannins in 70% acetone extracts of leaf, twig, and stem bark of Calliandra haematocephala were purified by a Sephadex LH-20 column, and their structures were identified using MALDI-TOF-MS and thiolysis-HPLC-ESI-MS analyses. The results showed that the condensed tannin structures varied significantly among C. haematocephala organs. The condensed tannins from leaf were essentially of prodelphinidins, consisting mainly of (epi)gallocatechin and (epi)gallocatechin-3-O-gallate units; the condensed tannins from twig and stem bark were predominately of procyanidins, with catechin, epicatechin, and (epi)catechin-3-O-gallate as the main constitutive units for the former and epicatechin as the main constitutive unit for the latter, respectively. Furthermore, in vitro antioxidant activities of these condensed tannins were evaluated using the ABTS •+ and FRAP methods. All of the condensed tannins exhibited stronger antioxidant activities compared to those of synthetic antioxidant BHA. For all organs, the two tested activities were found to be the highest in leaf condensed tannins, followed by that in twig condensed tannins and stem-bark condensed tannins. The resul
Who reads Comparison of Chemical Compositions and Antioxidant Activities of Condensed Tannins From Different Parts of Calliandra haematocephala?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Shudong Wei; Hui Chen; Yiming Lin
- Publisher
- Taylor and Francis Group; Informa UK (Taylor & Francis); Marcel Dekker Inc.; Informa UK Limited (ISSN 0277-3813)
- Published
- 2015
- Language
- EN
- Field
- Engineering (Physical Sciences)